Schooling is compulsory in New Zealand because they feel it is vital to their countries success. They place a very high value on education because they believe that's what it takes to get ahead in life and for the entire country. Without education, they feel one would go nowhere, and the country would not be able to succeed. Schooling is mandatory between the ages of 6 and 16 and is also free.
It is more advanced than in many other places in the country, and it is a place many want to study in, especially for the higher education which isn't cheap but is known to be among the best places for college. Schooling receives the attention in New Zealand that it should everywhere because it is that important to living a full and prosperous life and something we should enforce so everyone has a chance at success.